Siddhartha or Siddharta is the birth name of the founder of Buddhism, Gautama Buddha.
Siddhartha may also refer to:
- Siddhartha (novel), a fictional book about the life of a man (not the Buddha) named Siddhartha, by Hermann Hesse
- Siddhartha (film), the 1972 film of the book, directed by Conrad Rooks
- Siddhartha (opera), opera by Per Nørgård
- Siddhartha (musical), an original production by Chu Un Temple (慈恩寺) and BLIA Cebu. The musical play is in English and is based on the poetry and verses of Venerable Master Hsing Yun (Chinese: 星雲大師), founder of the Fo Guang Shan Buddhist Order
- King Siddartha, father of Mahavira, an important figure in Jain history
- Siddharta (band), a Slovenian rock band
- Siddhartha (American rock band)
- Siddartha University, the first and the only Buddhist university in Nepal
- SIDDHARTA, an experiment at DAFNE electron–positron collider in Italy
- "Siddhartha" song by Jerry Cantrell on the album Degradation Trip Volumes 1 & 2
Read more about Siddhartha: People